# import sys
#
# str = sys.stdin.readline()
# print(str)
#
# num = input("请输入第一个数字：")
# print(num)
#
# sys.stdout.write('hello')
# print('world')

# file = open('a.txt','r',buffering=1)
# print(file.read())
# file.close()

# with open('a.txt','r',encoding='utf-8', buffering=1) as file2:
#     #\n换行符
#     # print(file2.readline())
#     # print(file2.readline())
#     print(file2.readlines())#返回一个列表

#a 模式代表追加写入
with open('a.txt','a',encoding='utf-8', buffering=1) as file3:
    file3.write('1111111')